Foldable four-wheel walking aid



FIG. 1 is a first perspective view of a foldable four-wheel walking aid showing my new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom, view thereof;

FIG. 9 is a first perspective view of, another state of the foldable four-wheel walking aid thereof;

FIG. 10 is a second perspective view of another state of the foldable four-wheel, walking aid thereof; and,

FIG. 11 is an enlarged view of the selected portion in FIG. 1. 

CLAIM The ornamental design for a foldable four-wheel walking aid, as shown and described. 